I’m running Movable Type 2.66 now.  Like the last couple of updates, they’re mainly focusing on ways to deal with the explosion of comments spam.  3.0 is supposed to be just around the corner too, and they’re going even further by including a new user-subscription feature you can turn on if desired.  I don’t know if I’m going to go that far though; I like moderating my comments, and I like the fact that anyone can shoot their mouth off without having to sign up for a username.